Anne Keothavong has claimed she would have done broken into the world's top 50 years ago were it not for “unprofessional people” at the Lawn Tennis Association.The 25-year-old rose four places to 48th in the rankings, following her run to the semi-finals in the Cellular South Cup in Memphis last week.She is the first British woman since Jo Durie 16 years ago to make it into the top 50, and it continues the relatively late blossoming of a player who was ranked 134th 12 months ago.But, although Keothavong is now content with the support provided to her by the LTA, she has criticised the sport's governing body in Britain for hampering her progress earlier in her career.The Londoner, who turned professional in 2001, said she was now reaping the benefits of working with coaches she could trust.